/*
 * Copyright (c) 2007 innoSysTec (R) GmbH, Germany. All rights reserved.
 * Original author: Edmund Wagner
 * Creation date: 24.05.2007
 *
 * Source: $HeadURL$
 * Last changed: $LastChangedDate$
 * 
 * 
 * the unrar licence applies to all junrar source and binary distributions 
 * you are not allowed to use this source to re-create the RAR compression algorithm
 *
 * Here some html entities which can be used for escaping javadoc tags:
 * "&":  "&#038;" or "&amp;"
 * "<":  "&#060;" or "&lt;"
 * ">":  "&#062;" or "&gt;"
 * "@":  "&#064;" 
 */
package com.github.junrar.rarfile;

import com.github.junrar.io.Raw;

/**
 * 
 * the optional End header
 * 
 */
public class EndArcHeader extends BaseBlock
 {

  private static final short EARC_NEXT_VOLUME = 0x0001;
  private static final short EARC_DATACRC = 0x0002;
  private static final short EARC_REVSPACE = 0x0004;
  private static final short EARC_VOLNUMBER = 0x0008;

  private static final short endArcHeaderSize = 6;
  public static final short endArcArchiveDataCrcSize = 4;
  public static final short endArcVolumeNumberSize = 2;

  private int archiveDataCRC;
  private short volumeNumber;

  public EndArcHeader(BaseBlock bb, byte[] endArcHeader)
   {
    super(bb);

    int pos = 0;
    if (hasArchiveDataCRC())
     {
      archiveDataCRC = Raw.readIntLittleEndian(endArcHeader, pos);
      pos += 4;
     }
    if (hasVolumeNumber())
     {
      volumeNumber = Raw.readShortLittleEndian(endArcHeader, pos);
     }
   }

  public int getArchiveDataCRC()
   {
    return archiveDataCRC;
   }

  public short getVolumeNumber()
   {
    return volumeNumber;
   }
 }
